Plasmonic Catalysis and Photochemical Energy Conversion

Plasmonic catalysis harnesses the collective oscillations of conduction electrons in metal nanostructures to convert solar or visible light into chemical energy. When excited at specific wavelengths, localized surface plasmon resonances generate intense electromagnetic near-fields, energetic charge carriers (“hot” electrons or holes) and nanoscale heating. These effects can drive or steer chemical transformations at metal–reactant interfaces, offering routes to sustainable hydrogen production, selective carbon dioxide reduction and multi-step organic syntheses under mild conditions. Architectures such as antenna–reactor heterostructures, bimetallic alloys and ordered supercrystals have been developed to optimise light absorption, charge separation and reactant binding. Complementary advances in in situ spectroscopy and quantitative electrochemical measurements are clarifying the balance between photothermal and non-thermal pathways. Together, these efforts point to globally significant technologies for solar fuels and green chemical manufacturing.

Research from Nature Portfolio

Recent work has demonstrated two-dimensional bimetallic supercrystals in which platinum nanoparticles are embedded within ordered gold lattices to achieve hydrogen generation from formic acid at high rates under visible illumination. Electromagnetic hotspots concentrate electric fields at platinum sites, boosting catalytic turnover beyond thermal contributions. In another advance, in situ surface-enhanced Raman spectroscopy with isotope labelling has revealed a rich array of C1–C4 intermediates on silver nanoparticle surfaces during plasmon-driven CO₂ reduction in water, highlighting efficient C–C coupling pathways towards multi-carbon fuels. Foundational mechanistic studies have also confirmed that direct charge transfer from plasmonic metal to adsorbate orbitals can dominate over photothermal effects, thereby enabling selective activation of targeted chemical bonds and offering design principles for next-generation plasmonic catalysts.

Plasmonic Catalysis and Photochemical Energy Conversion publication trend

The graph below shows the total number of articles in plasmonic catalysis and photochemical energy conversion across all publications each year (not limited to Nature Index journals).

Technical terms

Localized surface plasmon resonance (LSPR): Resonant oscillation of conduction electrons in metal nanoparticles induced by incident light, producing strong near-fields and energetic charge carriers.

Hot carriers: Non-equilibrium electrons or holes generated by plasmon decay, possessing sufficient energy to drive chemical bond activation or charge transfer to adsorbates.

Photothermal effect: Localised heating of a catalyst nanoparticle due to non-radiative relaxation of plasmonic excitations, which can accelerate conventional thermal reaction pathways.

Antenna–reactor heterostructure: Nanostructure combining a plasmonic “antenna” metal with an adjacent catalytic “reactor” phase to synergistically enhance light harvesting and chemical reactivity.

Supercrystal: Ordered assembly of nanoparticles in a periodic lattice, designed to amplify electromagnetic coupling and generate collective plasmonic effects for catalysis.

References

1. Plasmonic bimetallic two-dimensional supercrystals for H2 generation. Nature Catalysis (2023).
2. Evidence and implications of direct charge excitation as the dominant mechanism in plasmon-mediated photocatalysis. Nature Communications (2016).
3. Simple experimental procedures to distinguish photothermal from hot-carrier processes in plasmonics. Light: Science & Applications (2020).
4. Hybrid Plasmonic Nanomaterials for Hydrogen Generation and Carbon Dioxide Reduction. ACS Energy Letters (2022).
5. A rich catalog of C–C bonded species formed in CO2 reduction on a plasmonic photocatalyst. Nature Communications (2021).